zic
Compile timezone data files
TLDR
Compile from directory
$ zic -d [path/to/directory]
Compile with warnings$ zic -v [path/to/file].infile
SYNOPSIS
zic [OPTIONS] [FILE...]
DESCRIPTION
zic compiles timezone data files into binary format used by the system. It reads text files describing timezone rules and produces the binary files used by localtime and related functions.
This is primarily used for system administration to update timezone data.
PARAMETERS
-d DIRECTORY
Output directory for compiled files-v
Report warnings during compilation-L FILE
Leap second file-y COMMAND
Year type command
CAVEATS
Requires properly formatted timezone source files. Typically run as root. Incorrect data can break time handling system-wide.